UPDATE: Jackknifed big rigs block I-5 lanes

A big rig jackknifed in a tunnel near the interchange of southbound Interstate 5 and westbound Highway 14 prompted the California Highway Patrol to close down truck route lanes in the area.

The truck got turned around in a way that blocked all the I-5 truck route lanes and made it impossible to divert traffic.

All truck lanes on the southbound I-5 in the area are closed “until further notice,” said CHP Officer Christian Cracraft.

The original Sigalert issued for the incident estimated the roadway would be clear within the next hour or so., but Cracraft said at 3:30 p.m. that the truck lanes will be closed for "a lot longer than that."

The California Highway Patrol also issued a Sigalert for the southbound I-5 near Calgrove Boulevard due to a second jackknifed big rig.

The truck blocked two lanes of traffic in the area, but was cleared up as of 3 p.m.

The two incidents have made southbound traffic on the I-5 slow all the way back to Magic Mountain Parkway for a time, according to CHP reports. Traffic was flowing easier at 3:35 p.m. but is still slow going near the I-5 interchange with Highway 14.

Deputies with the Santa Clarita Valley Sheriff's Station reported no serious traffic collisions in the city during Friday's rainy weather, though one car did crash through a cinderblock wall and ended up in a backyard near the intersection of Haskell Canyon Road and Copper Hill Drive at 2:30 p.m.

Sgt. Brian Allen with the Sheriff's Station said no one was hurt in that crash.